AnalyzerSentence analysis6SpansSentence等差数列の初項は3です。1000 character limitAnalyzeSentence等とう差さ数すう列れつの初しょ項こうは3です。Span Details等とう差さ数すう列れつarithmetic progression; arithmetic sequencenounのpossession, attribution, nominalizer, or nominal linkergrammar初しょ項こうfirst term; initial termnounはtopic markergrammar3さん-です。be; is; arecopula, auxiliary出洲ですspit of land; sandspit